Until NetApp can prove to me that their solution is faster than locally attached RAID using "partitions"/"raw I/O" [raw I/O is part of Linux 2.4.X kernel and probably ASE 12.5 for Linux] where we can do asynchronous read/write [filesystem will *always* be synchronous] I would not recommend
it
to anyone.
Since you're fond of testing, why don't you test this yourself? Synchronous over NFS may very well be faster than raw partitions, but it depends on your particular load. You would need to test it yourself to determine... Netapp can't "prove" it to you.
Bruce